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* See LICENSE.md for licensing information.

package org.usb4java.test;

import static org.junit.Assume.assumeTrue;

import java.io.BufferedReader;

import java.io.InputStream;

import java.io.InputStreamReader;

import org.usb4java.LibUsb;

/**

* USB-related assumptions.

* @author Klaus Reimer (k@ailis.de)

public class UsbAssume

{

/** If USB tests are to be executed. */

private static Boolean usbTests;

/** If TCK tests are to be executed. */

private static Boolean tckTests;

/**

* Check if USB tests are enabled.

* USB tests can be controlled with the system property USB_TESTS. When

* set to true then USB tests are always run, if set to false then they

* are never run. If this property is not set then the command-line tool

* lsusb is called. If this tool returned at least two lines of text then

* USB tests are enabled. In all other cases they are disabled.

* @return True if USB tests are enabled, false if not.

public static boolean isUsbTestsEnabled()

{

if (usbTests == null && System.getProperty("USB_TESTS") != null)

usbTests = Boolean.valueOf(System.getProperty("USB_TESTS"));

if (usbTests == null)

{

usbTests = false;

try

{

final Process proc = Runtime.getRuntime().exec("lsusb");

if (proc.waitFor() == 0)

{

InputStream inputStream = proc.getInputStream();

try

{

BufferedReader reader =

new BufferedReader(new InputStreamReader(

inputStream));

try

{

int lines = 0;

while (reader.readLine() != null)

lines++;

usbTests = lines >= 2;

}

finally

{

reader.close();

}

finally

{

inputStream.close();

}

catch (Exception e)

{

// Ignored. USB tests are silently disabled when lsusb could

// not be run.

}

return usbTests;

}

/**

* Assume that USB tests are enabled. Call this in the first line of

* tests method or preparation methods when you want to ignore the

* tests when the system is not able to run the tests anyway.

* USB tests can be controlled with the system property USB_TESTS. When

* set to true then USB tests are always run, if set to false then they

* are never run. If this property is not set then the command-line tool

* lsusb is called. If this tool returned at least two lines of text then

* USB tests are enabled. In all other cases they are disabled.

public static void assumeUsbTestsEnabled()

{

if (!isUsbTestsEnabled())

{

assumeTrue("This test is ignored when USB_TESTS property is not set",

usbTests);

}

/**

* Assume that libusb supports hotplug on the current system.

public static void assumeHotplugAvailable()

{

assumeUsbTestsEnabled();

assumeTrue("This test is ignored because libusb doesn't support " +

"hotplug on this system",

LibUsb.hasCapability(LibUsb.CAP_HAS_HOTPLUG));

}

/**

* Assume that TCK tests are enabled. Call this in the first line of

* tests method or preparation methods when you want to ignore the

* tests when the system is not able to run the TCK tests anyway.

* TCK tests can be controlled with the system property TCK_TESTS. When

* set to true then TCK tests are always run, if set to false then they

* are never run. If this property is not set then the command-line tool

* lsusb is called to scan for the TCK hardware. If this tool found the

* TCK hardware then TCK tests are enabled. In all other cases they are

* disabled.

public static void assumeTckTestsEnabled()

{

assumeUsbTestsEnabled();

if (tckTests == null && System.getProperty("TCK_TESTS") != null)

tckTests = Boolean.valueOf(System.getProperty("TCK_TESTS"));

if (tckTests == null)

{

tckTests = false;

try

{

final Process proc = Runtime.getRuntime().exec("lsusb");

if (proc.waitFor() == 0)

{

InputStream inputStream = proc.getInputStream();

try

{

BufferedReader reader =

new BufferedReader(new InputStreamReader(

inputStream));

try

{

String line = reader.readLine();

while (line != null)

{

if (line.contains("0547:1002"))

{

tckTests = true;

break;

}

line = reader.readLine();

}

finally

{

reader.close();

}

finally

{

inputStream.close();

}

catch (Exception e)

{

// Ignored. USB tests are silently disabled when lsusb could

// not be run.

}

assumeTrue("This test is ignored when TCK_TESTS property is not set",

tckTests);

}

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